A network fault is preventing people on Three from making calls and customers are angry

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LONDON — A network fault prevented some people on Three's mobile network from making and receiving calls.

The fault affected Three customers trying to receive calls from EE customers.

Hundreds of customers took to Twitter to vent their frustrations and the Three support responded to many of them.

"We're aware of a a technical issue that's impacting some calls at the moment," Three wrote on Twitter around 1:30pm on Monday.

"Sorry for any inconvenience caused. We're doing all we can to fix this ASAP."

One Three customer with the username @Globaltravelle3 wrote on Twitter that the network outage had come at a particularly bad time for him and his wife.

"@ThreeUK my wife and I haven't been able to make calls. DISGRACE! My wife is pregnant and the baby is due soon!!!" he said.

Three responded: "Sorry to hear your frustration. Hopefully our support team can help you out >@ThreeUKSupport".

Business Insider made a phone call to a device on Three's network without any issues.

A Three spokesperson said on Monday: "Some of our customers did experience connectivity issues earlier today using voice and SMS services. This problem has now been resolved and all services have been restored. We are sorry for any inconvenience caused."